You may be right SmokesToMuch.....It does make sense why the more sensitive of the two units is turning off. The units are side by side.
I am exploring GR33NL3AF's idea of linking the AC into the lights duct. This could also help solve the noise factor. Now, I have a duct to intake air for the 2 100 watt lights in a window box, drawing air from outside (probably the loudest aspect of the noise outside my house). The fan drawing the air in is an 8" inline, inside of the tent. If I take that duct out of the window and use it to direct the AC directly to the lights, not only will that cool the lights more effectively but it will also eliminate some of the noise outside the house. The lights heat is without a doubt the biggest cause of my heat issues. I am perfectly fine if I run them at 600 watts. All my problems happen when I increase the wattage to 1000.
Redirecting the AC to the lights would also separate the two ACs, as GR33NL3AF has indicated, I think I should be able to control the rest of the room temp with fans. Yesterday I upgraded the intake air to the room from outside and it helped. Although it is when my lights come back on at 5pm that my system gets tested. I will know tonight if the air intake for the room was actually helpful.
I live close to the beach and generally it is not all that hot. Normally if we have a heat wave it doesn't last too long. The last month or so has been unusual!
BIG QUESTION: Will I ever get to the point of being able to relax some and not always be monitoring and adjusting? Haha....I am wondering what I have gotten myself into. Don't get me wrong, I love the physical labor, as well as nurturing the plants, but, I do have other activities in my life (Artist) and I was hoping to have time for these!